Life & Style can exclusively reveal that Real Housewives of Atlanta star Kim Zolciak and boyfriend Kroy Biermann are expecting their first child together! "I was surprised!" Kim, 32, tells Life & Style about the pregnancy. "While it wasn't planned, g*d clearly has a bigger and better plan for us and we're excited."

At first, Kim denied reports that she was pregnant when a jealous ex leaked the news back in October. "I was appalled and disgusted by that," she says. "I wasn't through my first trimester -- you never know what could happen."

But now Kim is three months pregnant and ready to share the wonderful news, telling Life & Style: "I'm the happiest I've ever been."

Kim, who has two daughters from a previous marriage, Brielle, 13, and Ariana, 9, has been dating Kroy since May - viewers saw her meet the 25-year-old Atlanta Falcons defensive end on the Nov. 14 episode of Housewives. "He makes me a better person," says Kim. "I love everything about him."

The couple has yet to find out the sex of the baby, but boy or girl, Kim can't wait to start a family with the football star. "I definitely don't want to get married while I'm pregnant," she says. "But I can see myself marrying Kroy in the future."

Watch Kim on The Real Housewives of Atlanta Sundays at 9 p.m. on Bravo and download her single, "Google Me," on iTunes on Nov. 30.

For more from Kim on her pregnancy, pick up this week's issue of Life & Style, on newsstands now.